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J. G.. COLLINS. WASHER PoR sooKBT BoLTs IN STEAM BoILERs.

Patented Mar. 19. 1867.

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JOSEPH Gr. COLLINS. OF BOSTON, MASSACHUSETTS.

Letters Patent No. 63,021, dated March 19, 1867 IMPROVED WASHER FOR SOCKET-BOLTS IN STEAM BOILERS.

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'ro ALL WHoM 1T MAY coNcEnN: A Bc it known that I, JOSEPH G. COLLINS, of Boston, in the county of Sutl'olk, and State of AMassachusetts,l have-invented a new and useful improvement in the Washers which are used on Sooket-Bolts which ,pass through the water-legs, and other similar portions of Steam Boilers, of which the followingvs o. full, clear, and exact description, reference-boing had to the accompanying drawings, making part of this specification, in which- Figure 1 is a central section; and l Figure 2, a plan of ,one of my improved round washers.

AFigures 3 and 4 are central sections and plan'of one qf my improved square or -fo'ur sided washers. Figure 5 shows two sections of boiler-plate with a ,socket-bolt and two of my improved Awashers vapplied thereto.

Figure 6 is a section of plate, washer, and bolt,'as noiv incommon use, and is drawn only to show the `dierencebetween it'and my invention.

In the use of socket-bolts in water-legs', and other similar portions of stoam boilers, it is necessary that the heads and nuts of such bolts should be packed in a suitable manner to prevent leakagebetwecn said bolts and the boiler-plate through which they pass.v

To prevent sch leakage, it is common to employe flat washeriwhi'ch has had a portion of the metal removed from one side around the central hole, in the form of a countersink, as shown at a, in fig. 6; This countersink is filled with cementin a plastic state, which hardens by the application of heat; but as the counter-sink in the washer must beliniited in capacity or size','it is diicult to apply 'the cement; in a. proper quantity and condition to 'make tight work, as'the holt-holes are frequently'rongh, ragged, full of splits, deep cracks, and sealy patches which prevent a small ring of cement having the desired effect; besides, the extra' labor required to remove the metal and form the countersink in the washer'renders said washers quite expensive.

In carrying out my invention, instead of removing a portion of the 'metal from a. nat-washer, I form the Washer in the process of punching or casting, onc side of said washer being concave and the bther side convex,

as shown in section in gs. 1, 3, and 5, and in some cases I flatten the convex side of `che washer', as shown in red lines at b, in fig. 5.

It will, therefore, be readily seen that the outer edge only of the concave washers b and ccome's in ,contacs with the plates D and E, leaving a large space, e, betweenthe washer and plate for the reception of cement, so that a sniicient quantity of cement may be used to make tight work under all circumstances, l

The washers b and o should be' of sufficient thickness to allowtlie 'nut d on the holt B to' he screwed on far enough *to bring the plates D and E firmly against the ends of the socket C and not cripple or.crsh the washer, and when greatstrain is required to bring the plates hard against the socketC, the convex side of the washer may bc ilattened, as at o, iig. 5; but thevoppositcside of the washer must be'lcft concave for thereception of cem'ent. p A I My improved concave washers for socket-bolts in steam 'boilers may be punched from plate iron, or they may be cast in' malleable iron or other suitable metal. In either caseonly one operation is required to complete `the construction or formation of-said washer, thus rendering it much cheaper and abetter packing arrangement than any'washcr heretoforeused on socket-bolts in steamboilers.-

I do not claim a countersunl fiat washer for packing the socket-bolts invstcam boilers, but I claim a washer constructed'or formed substantially as herein shown' and described foithc purposesct forth.

" JOSEPH c. COLLINS.

. Witnesses:

JonN E.. Cnown, J. B. SAMUELS. 

